GHSA-HF43-47Q4-FHQ5

Vulnerability from github – Published: 2024-04-10 17:16 – Updated: 2024-04-10 22:01
VLAI
Summary
XWiki Commons missing escaping of `{` in Velocity escapetool allows remote code execution
Details

Impact

The HTML escaping of escaping tool that is used in XWiki doesn't escape {, which, when used in certain places, allows XWiki syntax injection and thereby remote code execution.

To reproduce in an XWiki installation, open <xwiki-host>/xwiki/bin/view/Panels/PanelLayoutUpdate?place=%7B%7B%2Fhtml%7D%7D%7B%7Basync%20async%3Dfalse%7D%7D%7B%7Bvelocity%7D%7D%23evaluate(%24request.eval)%7B%7B%2Fvelocity%7D%7D%7B%7B%2Fasync%7D%7D&eval=Hello%20from%20URL%20Parameter!%20I%20got%20programming%3A%20%24services.security.authorization.hasAccess(%27programming%27) where <xwiki-host> is the URL of your XWiki installation. If this displays You are not admin on this place Hello from URL Parameter! I got programming: true, the installation is vulnerable.

Patches

The vulnerability has been fixed on XWiki 14.10.19, 15.5.5, and 15.9 RC1.

Workarounds

Apart from upgrading, there is no generic workaround. However, replacing $escapetool.html by $escapetool.xml in XWiki documents fixes the vulnerability. In a standard XWiki installation, we're only aware of the document Panels.PanelLayoutUpdate that exposes this vulnerability, patching this document is thus a workaround. Any extension could expose this vulnerability and might thus require patching, too.

References

  • https://github.com/xwiki/xwiki-commons/commit/b94142e2a66ec32e89eacab67c3da8d91f5ef93a
  • https://jira.xwiki.org/browse/XCOMMONS-2828
  • https://jira.xwiki.org/browse/XWIKI-21438
Severity
10.0 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.commons:xwiki-commons-velocity"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.1"
            },
            {
              "fixed": "14.10.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.commons:xwiki-commons-velocity"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.0-rc-1"
            },
            {
              "fixed": "15.5.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.commons:xwiki-commons-velocity"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.6-rc-1"
            },
            {
              "fixed": "15.9-rc-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-31996"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94",
      "CWE-95"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-04-10T17:16:37Z",
    "nvd_published_at": "2024-04-10T21:15:07Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\nThe HTML escaping of escaping tool that is used in XWiki doesn\u0027t escape `{`, which, when used in certain places, allows XWiki syntax injection and thereby remote code execution.\n\nTo reproduce in an XWiki installation, open `\u003cxwiki-host\u003e/xwiki/bin/view/Panels/PanelLayoutUpdate?place=%7B%7B%2Fhtml%7D%7D%7B%7Basync%20async%3Dfalse%7D%7D%7B%7Bvelocity%7D%7D%23evaluate(%24request.eval)%7B%7B%2Fvelocity%7D%7D%7B%7B%2Fasync%7D%7D\u0026eval=Hello%20from%20URL%20Parameter!%20I%20got%20programming%3A%20%24services.security.authorization.hasAccess(%27programming%27)` where `\u003cxwiki-host\u003e` is the URL of your XWiki installation. If this displays `You are not admin on this place Hello from URL Parameter! I got programming: true`, the installation is vulnerable.\n\n### Patches\nThe vulnerability has been fixed on XWiki 14.10.19, 15.5.5, and 15.9 RC1.\n\n### Workarounds\nApart from upgrading, there is no generic workaround. However, replacing `$escapetool.html` by `$escapetool.xml` in XWiki documents fixes the vulnerability. In a standard XWiki installation, we\u0027re only aware of the document `Panels.PanelLayoutUpdate` that exposes this vulnerability, patching this document is thus a workaround. Any extension could expose this vulnerability and might thus require patching, too.\n\n### References\n- https://github.com/xwiki/xwiki-commons/commit/b94142e2a66ec32e89eacab67c3da8d91f5ef93a\n- https://jira.xwiki.org/browse/XCOMMONS-2828\n- https://jira.xwiki.org/browse/XWIKI-21438",
  "id": "GHSA-hf43-47q4-fhq5",
  "modified": "2024-04-10T22:01:56Z",
  "published": "2024-04-10T17:16:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-hf43-47q4-fhq5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-31996"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-commons/commit/b0805160ec7b01ee12417e79cb384e60ae4817aa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-commons/commit/b94142e2a66ec32e89eacab67c3da8d91f5ef93a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-commons/commit/ed7ff515a2436a1c6dcbd0c6ca0c41e434d58915"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xwiki/xwiki-commons"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XCOMMONS-2828"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XWIKI-21438"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "XWiki Commons missing escaping of `{` in Velocity escapetool allows remote code execution"
}



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